package com.medicine.controller.user;

import com.medicine.constant.StatusConstant;
import com.medicine.entity.Medicine;
import com.medicine.result.Result;
import com.medicine.service.MedicineService;
import com.medicine.vo.MedicineVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;

@RestController("userMedicineController")
@RequestMapping("/user/medicine")
@Slf4j
@Api(tags = "C端-药品浏览接口")
public class MedicineController {
    @Autowired
    private MedicineService medicineService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询药品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询药品")
    public Result<List<MedicineVO>> list(Long categoryId) {

        //构造redis中的key，规则：medicine_分类id
        String key = "medicine_" + categoryId;

        //查询redis中是否存在药品数据
        List<MedicineVO> list = (List<MedicineVO>) redisTemplate.opsForValue().get(key);
        if(list != null && list.size() > 0){
            //如果存在，直接返回，无须查询数据库
            return Result.success(list);
        }

        Medicine medicine = new Medicine();
        medicine.setStatus(StatusConstant.ENABLE);//查询起售中的药品

        //如果不存在，查询数据库，将查询到的数据放入redis中
        list = medicineService.listWithFlavor(medicine);
        redisTemplate.opsForValue().set(key, list);

        return Result.success(list);
    }

}
